Category pages have error 500 after upgrade from 1.6.1.20 to 1.6.1.24

[madmartian]

I wouldn't think upgrading from 1.6.1.20 to 1.6.1.24 would be a big deal, but it broke all my category pages. Everything except the homepage gets an error 500.

This is not the same as other folks reporting this problem with a 404 error. I am not using an SEO module that removes the category number. My category pages aren't missing - they are generating a 500 error, not 404. Product pages work fine - this only affects the category pages.

Note that I can see all the categories in the back office just fine.

I am using the default prestashop theme. Configuration of top menu looks normal. I tried adding an existing subcategory to the top menu and that link also failed with a 500 error.

I also tried disabling and re-enabling friendly URLs and clearing the cache under Performance. No change.

Edited May 25, 2020 by madmartian (see edit history)

[JBW]

Activate debug mode to see the details of the 500 error

[madmartian]

Notice: Undefined property: CategoryController::$objectPresenter in /home/wjf90ljtxjte/public_html/shop/controllers/front/listing/CategoryController.php on line 186

Fatal error: Uncaught Error: Call to a member function present() on null in /home/wjf90ljtxjte/public_html/shop/controllers/front/listing/CategoryController.php:186 Stack trace: #0 /home/wjf90ljtxjte/public_html/shop/controllers/front/listing/CategoryController.php(103): CategoryControllerCore->getTemplateVarCategory() #1 /home/wjf90ljtxjte/public_html/shop/classes/controller/Controller.php(170): CategoryControllerCore->init() #2 /home/wjf90ljtxjte/public_html/shop/classes/Dispatcher.php(367): ControllerCore->run() #3 /home/wjf90ljtxjte/public_html/shop/index.php(28): DispatcherCore->dispatch() #4 {main} thrown in /home/wjf90ljtxjte/public_html/shop/controllers/front/listing/CategoryController.php on line 186

 

Note that line 186 in that file is:

       $category = $this->objectPresenter->present($this->category);

Edited May 27, 2020 by madmartian (see edit history)

[madmartian]

So apparently that file was left over from my failed 1.7 upgrade attempt and deleting the file was the solution. Categories are working again. Is there a list somewhere on other files I should delete after a failed 1.7 upgrade attempt? I already deleted the files to fix modules (ps_ etc), but apparently that list was not complete.

[madmartian]

And thanks @JBW for the tip.